CN201229823Y - High and low frequency combined inductor - Google Patents
High and low frequency combined inductor Download PDFInfo
- Publication number
- CN201229823Y CN201229823Y CNU2008200951149U CN200820095114U CN201229823Y CN 201229823 Y CN201229823 Y CN 201229823Y CN U2008200951149 U CNU2008200951149 U CN U2008200951149U CN 200820095114 U CN200820095114 U CN 200820095114U CN 201229823 Y CN201229823 Y CN 201229823Y
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- inductor
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Abstract
The utility model relates to a high and low frequency composite inductor, which comprises a magnetic core and a coil arranged around the magnetic core, wherein, terminals are respectively arranged at both ends of the coil. The terminal is provided with one or a plurality of magnetic bead serially connected with the coil. The utility model provides a high and low frequency composite inductor adopting high-frequency magnetic bead aimed at the defect of lowering high frequency impedance and narrowing application frequency band caused due to wiring capacitance existing in the inductor of prior art. A new inductor is formed through sealing original inductor and one or a plurality of magnetic bead serially connected with both ends of the coil together. The utility model has the advantages of improving the high frequency impedance of original inductor and expanding the application frequency band of the original inductor through using high frequency impedance of the bead and cooperating with the low frequency impedance of the original inductor.
Description
Technical field
The utility model relates to inductor, more particularly, relates to a kind of compound inductor of low-and high-frequency that adopts the high frequency magnetic bead.
Background technology
Along with the extensive utilization of electric, electronics and information equipment, electromagnetic interference problem is increasingly serious, and wherein Switching Power Supply is because of himself operation principle reason, and the electromagnetic emission problem is more particularly outstanding, and inductor filter is to suppress and the important measures that reduce this electromagnetic interference.Only there is inductance in desirable inductor, but actual inductor also has dead resistance and distributed capacitance, dead resistance is the coil windings of inductor and the resistance that device itself carries, distributed capacitance is between the winding of coil, between coil and the radome, the electric capacity that exists between coil and the base plate, these factors badly influence the size of inductor high-frequency resistance, thereby making the high-frequency resistance of inductor reduce, the application band of inductor becomes narrow.
The utility model content
The technical problems to be solved in the utility model is, has distributed capacitance and makes the defective that high-frequency resistance reduces and application band narrows down of inductor at the above-mentioned inductor of prior art, and a kind of compound inductor of low-and high-frequency that adopts the high frequency magnetic bead is provided.
The technical scheme that its technical problem that solves the utility model adopts is: construct the compound inductor of a kind of low-and high-frequency, comprise magnetic core and the coil that is provided with around described magnetic core, the two ends of described coil are respectively equipped with terminals, according to the utility model, the terminals of described coil are electrically connected with one or more magnetic beads of connecting with described coil.
In the compound inductor of low-and high-frequency described in the utility model, described magnetic core and coil stationary are on a support, and described support is provided with the pin that is electrically connected with the terminals of described coil.
In the compound inductor of low-and high-frequency described in the utility model, described one or more magnetic beads are connected between described terminals and the pin, and connect mutually with pin with described coil.
In the compound inductor of low-and high-frequency described in the utility model, described one or more magnetic beads are connected on the described pin, and connect mutually with pin with described coil.
Implement the compound inductor of low-and high-frequency of the present utility model, has following beneficial effect: by the high frequency magnetic bead of connecting at the coil two ends of inductor, be packaged together with former inductor and form new inductor, utilize the high-frequency resistance characteristic of magnetic bead, the low-frequency impedance characteristic that cooperates former inductor, improve the high-frequency resistance size of former inductor, widened the application band of former inductor.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of first embodiment of the compound inductor of low-and high-frequency of the present utility model;
Fig. 2 is the structural representation of second embodiment of the compound inductor of low-and high-frequency of the present utility model;
Fig. 3 is the circuit theory diagrams of the equivalent model of traditional inductor;
Fig. 4 is the circuit theory diagrams of the equivalent model of the compound inductor of low-and high-frequency of the present utility model;
Fig. 5 is the curve chart of the frequency impedance of the inductor before improving;
Fig. 6 is the curve chart of the frequency impedance of the compound inductor of low-and high-frequency of the present utility model.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1, there is shown the structural representation of first embodiment of the compound inductor of low-and high-frequency of the present utility model.In first embodiment of the present utility model, the compound inductor of shown low-and high-frequency comprises magnetic core 1 and the coil 2 that is provided with around magnetic core 1, the two ends of coil 2 are respectively equipped with terminals, and according to feature of the present utility model, the terminals of coil 2 are provided with one or more magnetic beads 3 of connecting with above-mentioned terminals.Wherein magnetic core 1 and coil 2 are fixed on the support 4, and support 4 is provided with the pin 5 that is electrically connected with the terminals of coil 2.The magnetic beads 3 that but one or more and above-mentioned terminals of cross-under and pin 5 are connected mutually between terminals and the pin 5.The compound low-frequency impedance of former inductor and the high-frequency resistance of magnetic bead 3 of utilizing of the utility model, form a compound inductor, simultaneously to all not restrictions such as the shape of former inductor, winding mode, the number of turns on the shape of magnetic bead 3, the magnetic bead 3 with and the kind of the magnetic bead of being gone here and there 3, individual number average do not limit.First embodiment of the present utility model shown in Figure 1 can not increase the volume of former inductor, can be preferred on the ground that volume is limited.
As shown in Figure 2, there is shown the structural representation of second embodiment of the compound inductor of low-and high-frequency of the present utility model.In second embodiment of the present utility model, the compound inductor of shown low-and high-frequency comprises magnetic core 1 and the coil 2 that is provided with around magnetic core 1, the two ends of coil 2 are respectively equipped with terminals, and according to feature of the present utility model, the terminals of coil 2 are provided with one or more magnetic beads 3 of connecting with above-mentioned terminals.Wherein magnetic core 1 and coil 2 are fixed on the support 4, and support 4 is provided with the pin 5 that is electrically connected with the terminals of coil 2.According to the feature of second embodiment of the present utility model, shown one or more magnetic beads 3 are connected on the pin 5, and connect mutually with pin 5 with terminals.The compound low-frequency impedance of former inductor and the high-frequency resistance of magnetic bead 3 of utilizing of the utility model, form a compound inductor, simultaneously to all not restrictions such as the shape of former inductor, winding mode, the number of turns on the shape of magnetic bead 3, the magnetic bead 3 with and the kind of the magnetic bead of being gone here and there 3, individual number average do not limit.Second embodiment of the present utility model shown in Figure 1 need increase the height of former inductor, can preferentially select for use in highly unrestricted place.It should be noted that Fig. 1 and Fig. 2 only show two preferred embodiments of the utility model, under the situation of volume and highly permission, a plurality of high frequency magnetic beads of can connecting, and these equal replacements and change all should be within the scopes of the utility model protection.
As shown in Figure 3, there is shown the schematic diagram of the equivalent model of traditional inductor.Only there is inductance in desirable inductor, but actual inductor also has dead resistance and distributed capacitance.These factors badly influence the size of inductor high-frequency resistance, thereby make the high-frequency resistance of inductor reduce, and the application band of inductor becomes narrow.In Fig. 3, L1 represents the lumped inductance parameter, and R represents dead resistance, and C1 represents distributed capacitance, and inductance L 1 is in parallel with capacitor C 1 again after connecting with resistance R.
As shown in Figure 4, there is shown the schematic diagram of the equivalent model of the compound inductor of low-and high-frequency of the present utility model.In Fig. 4, L1 represents the lumped inductance parameter, and R represents dead resistance, and C1 represents distributed capacitance, and inductance L 1 is in parallel with capacitor C 1 again after connecting with resistance R, one or more magnetic beads of connecting again, the i.e. R1 of expression magnetic bead impedance among the figure.On the basis of existing inductor, one or more high frequency magnetic beads of connecting again, be packaged together with former inductor then and form new inductor, utilize the high-frequency resistance characteristic of magnetic bead, the low-frequency impedance characteristic that cooperates former inductor, improve the high-frequency resistance size of inductor, widened the application band of inductor.
Inductance and former inductor are at each frequency range resistance difference after this is example explanation improvement according to power supply input common mode inductance.In general, the lumped inductance L1 of power supply input common mode inductance is about several mH, seldom has above 10mH, and turn-to-turn capacitance C1 is about tens pF, and then the impedance corner frequency point of former inductor is about about 1MHz.Because the impedance operator of magnetic bead belongs to low-resistance in low-frequency range, former relatively inductor can be ignored in the impedance of this frequency range, so these frequency range two inductive impedance are equal substantially.Behind the corner frequency point of frequency greater than former inductor, former inductor then can present capacitive reactances, will with the stray inductance generation series resonance of magnetic bead, this frequency range is because the lumped resistance of magnetic bead is also smaller, so the inductor that the impedance magnitude of this frequency range is compared after the improvement can slightly descend.But along with the rising of frequency, the lumped resistance of magnetic bead can sharply rise, and general magnetic bead begins to rise about 1.5MHz resistance greatly, and the inductance after at this moment improving will be far longer than the impedance of former inductor, thereby increase the High frequency filter function.
As shown in Figure 5 and Figure 6, show the curve chart of the frequency impedance of the curve chart of frequency impedance of the inductor before improving and the compound inductor of low-and high-frequency of the present utility model respectively.The inductor equivalent-circuit model that provides according to inductance producer and the frequency impedance curve of magnetic bead, with MathCAD software to former inductor and the inductor after improving carry out emulation, calculate frequency impedance curve separately, result calculated as shown in Figure 5 and Figure 6.From figure the result of emulation as can be seen, the inductor high band impedance after the improvement is improved widely.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; any modification of being done within every spirit of the present utility model and the principle, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1, the compound inductor of a kind of low-and high-frequency, comprise magnetic core (1) and the coil (2) that is provided with around described magnetic core (1), the two ends of described coil (2) are respectively equipped with terminals, it is characterized in that, the terminals of described coil (2) are electrically connected with one or more magnetic beads (3) of connecting with described coil (2).
2, the compound inductor of low-and high-frequency according to claim 1 is characterized in that, described magnetic core (1) and coil (2) are fixed on the support (4), and described support (4) is provided with the pin (5) that is electrically connected with the terminals of described coil (4).
3, the compound inductor of low-and high-frequency according to claim 2 is characterized in that, described one or more magnetic beads (3) are connected between described terminals and the pin (5), and connects mutually with pin (5) with described coil (2).
4, the compound inductor of low-and high-frequency according to claim 2 is characterized in that, described one or more magnetic beads (3) are connected on the described pin (5), and connects mutually with pin (5) with described coil (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200951149U CN201229823Y (en) | 2008-06-27 | 2008-06-27 | High and low frequency combined inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200951149U CN201229823Y (en) | 2008-06-27 | 2008-06-27 | High and low frequency combined inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201229823Y true CN201229823Y (en) | 2009-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200951149U Expired - Lifetime CN201229823Y (en) | 2008-06-27 | 2008-06-27 | High and low frequency combined inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201229823Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098334A (en) * | 2015-04-27 | 2016-11-09 | 株式会社村田制作所 | Coil component |
| CN113871172A (en) * | 2021-09-02 | 2021-12-31 | 合肥美的电冰箱有限公司 | Inductor |
-
2008
- 2008-06-27 CN CNU2008200951149U patent/CN201229823Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098334A (en) * | 2015-04-27 | 2016-11-09 | 株式会社村田制作所 | Coil component |
| CN113871172A (en) * | 2021-09-02 | 2021-12-31 | 合肥美的电冰箱有限公司 | Inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park B2 building 1-4 floor, building 6-10 Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090429 |
|
| CX01 | Expiry of patent term |